/Engine/Source/Runtime/OpenGLDrv/Public/OpenGLState.h
struct FRenderTarget
GLenum
AlphaBlendOperation
GLenum
AlphaDestBlendFactor
GLenum
AlphaSourceBlendFactor
bool
bAlphaBlendEnable
bool
bSeparateAlphaBlendEnable
GLenum
ColorBlendOperation
GLenum
ColorDestBlendFactor
GLenum
ColorSourceBlendFactor
uint32:  1
ColorWriteMaskA
uint32:  1
ColorWriteMaskB
uint32:  1
ColorWriteMaskG
uint32:  1
ColorWriteMaskR